Unlike exoskeletons, endoskeletons a. protect the animal well. b. need to be molted. c. are relatively heavy. d. can grow as the animal grows.

D. Endoskeletons are inside, like our bones, and get bigger as we grow. Exoskeletons don't, which is why they have to shed and regrow a new one when they grow.

What is the question? if you were looking to design a method of separating something, you can separate this compound by putting both in water and allowing the water to dissolve the sugar. then pour it into another beaker and evaporate it then boom! salt and sugar : ) 

Sorry its not enough info